LPA SPS21RU30 Micrometer Sight Set for Rock Island 1911 / Armscor – 3-Point

.br-product-v3{--br-ink:#17201c;--br-muted:#54615b;--br-line:#d9e0dc;--br-soft:#f5f7f5;--br-deep:#10271d;--br-gold:#f2d58e;color:var(--br-ink);font-size:16px;line-height:1.68;max-width:1040px;margin:0 auto}.br-product-v3 *{box-sizing:border-box}.br-product-v3 p{margin:0 0 12px}.br-product-v3 .br-hero-v3,.br-product-v3 .br-final{background:var(--br-deep);border-radius:18px;padding:clamp(24px,5vw,48px);margin:0 0 28px}.br-product-v3 .br-hero-v3,.br-product-v3 .br-hero-v3 p,.br-product-v3 .br-hero-v3 strong,.br-product-v3 .br-final,.br-product-v3 .br-final p,.br-product-v3 .br-final strong{color:#fff!important}.br-product-v3 .br-eyebrow{font-size:.78rem;line-height:1.3;letter-spacing:.12em;text-transform:uppercase;font-weight:800;margin-bottom:10px;color:var(--br-gold)!important}.br-product-v3 .br-hero-title{display:block;font-size:clamp(1.65rem,4vw,2.55rem);line-height:1.13;margin-bottom:14px;font-weight:850}.br-product-v3 .br-section-title{display:block;font-size:clamp(1.18rem,2.5vw,1.42rem);line-height:1.25;font-weight:850;margin:30px 0 13px;color:var(--br-ink)}.br-product-v3 .br-box{background:var(--br-soft);border:1px solid var(--br-line);border-radius:14px;padding:20px;margin:0 0 18px}.br-product-v3 .br-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0 0 18px}.br-product-v3 .br-card{border:1px solid var(--br-line);border-radius:14px;padding:18px;background:#fff}.br-product-v3 .br-card-title{display:block;font-size:1rem;line-height:1.35;font-weight:850;margin-bottom:8px;color:var(--br-ink)}.br-product-v3 details{border:1px solid var(--br-line);border-radius:12px;background:#fff;padding:0 16px;margin:10px 0}.br-product-v3 summary{cursor:pointer;font-weight:800;padding:14px 0;color:var(--br-ink)}.br-product-v3 details p{padding:0 0 14px;color:var(--br-ink)}.br-product-v3 .br-note{border-left:4px solid #b78c2c}@media(max-width:640px){.br-product-v3{font-size:15.8px;line-height:1.62}.br-product-v3 .br-grid{grid-template-columns:1fr}.br-product-v3 .br-hero-v3,.br-product-v3 .br-final{padding:24px 20px;border-radius:14px}.br-product-v3 .br-box,.br-product-v3 .br-card{padding:16px}}

LPA SPS · 3-Point · Rock Island 1911 / Armscor
The crucial point is not “Ruger,” but the exact LPA code SPS21RU30 This adjustable LPA sight set officially belongs to the Rock Island 1911 / Armscor platform according to the official LPA order table. The previous assignment to Ruger Mark IV was thus a risk of a bad purchase.
The ending 30 indicates the version with white dots. Mechanical fit still takes priority over sight picture: the existing mount and firearm variant must match the LPA set.

Black-Raptor Buying Guide
The SPS21RU30 is interesting if you’re looking for a low-profile, adjustable sight with a clear three-point orientation for a suitable Rock Island / Armscor 1911. It’s not a universal 1911 solution and definitely not a Ruger Mark IV set.


Fits well if … … your pistol belongs to the Rock Island 1911 / Armscor family named by LPA, the existing sight mount is unchanged, and you prefer a classic three-point sight picture.


Probably doesn’t fit if … … you’re only buying a similarly looking 1911 rear sight, the mount has already been modified, or you actually want to equip a Ruger Mark IV.


Read compatibility correctly


Manufacturer code first SPS21RU30 is the reliable identity. Shopify SKU 806237 is the shop/supplier ID and not to be equated with the LPA code.


Platform according to LPA Rock Island 1911 / Armscor. The older shop assignment to Ruger Mark IV was factually wrong and has been corrected.


Sight picture end code 30: white dots. This helps with quick orientation but does not replace proper top edge alignment and correct sight height.


What counts before ordering Check model, existing rear sight/front sight mount, and any modifications. A 1911 designation alone is no proof of fit.


Limits, disadvantages
and typical bad purchases

No universal set: SPS21RU30 cannot be transferred to other 1911 platforms just because the contour looks similar.
No Ruger set: The previous Mark-IV assignment was a wrong code interpretation.
3-point is a matter of taste: If you prefer the calmest, blackest match picture possible, you should choose a different version.
Assembly condition matters: already milled, reworked or differently equipped slides can change the fit.

Technical data with practical interpretation


Manufacturer / Series LPA · SPS series. Adjustable sight set with compact design.


Manufacturer code SPS21RU30. This identifier is decisive for model assignment.


Compatibility Rock Island 1911 / Armscor according to official LPA order table.


Version 30 = white dot markings. No fiber optic and no Luminova version.


Scope of delivery
Product type: complete sight set consisting of rear sight and matching front sight. Adjustment tool included only as far as indicated by the respective LPA set or packaging; firearm and mounting tool are not part of the item.
FAQ
Does SPS21RU30 fit on Ruger Mark IV? No. The official LPA table assigns SPS21RU30 to Rock Island 1911 / Armscor. What does the suffix 30 mean? It stands for the version with white dots in the LPA table. Is "1911" enough as a compatibility indication? No. Check the specific firearm variant and the existing sight mount. Similar contours are not a measure of fit. Is this a single rear sight? No, SPS21RU30 is listed as a sight set and includes rear sight plus matching front sight.
Black Raptor · Avoiding bad purchases before marketing
Buy SPS21RU30 only if Rock Island 1911 / Armscor and the actual mount match. Do not decide based on the old Ruger title, image similarity, or just "1911".